The tallest man-made structure ever built – Burj Dubai – is to be officially opened today, 4 January 2010. The ceremony starts at 20:00 UAE. The finale will feature 10,000 firework effects on and from the tower, Ahmad Al Matrooshi, managing director, UAE, Emaar Properties, said.

Under the patronage of His Highness Shaikh Mohammed Bin Rashid Al Maktoum, UAE Vice President, Prime Minister, and Ruler of Dubai, Emaar is pleased to announce the inauguration of the Burj Dubai on the fourth anniversary of is Highness’ Accession as the Rule of Dubai on 4 January 2010. (source)

Downtown Burj Dubai

The construction began on 21 September 2004 (excavation commenced in January 2004), with the exterior of the structure completed on 1 October 2009. The completion day has been delayed a few times, and the interiors are to be completed by the end of year 2010. The final height of the building will supposedly be announced too, but according to Fury on Skyscrapercity:

IMO this thing is 818.0 as per the plans measured from the floor of the ground level to the top of tier 30. The CTBUH‘s height to tip will include the 6.0 meter high concourse level beneath the ground level and the ~0.6 meter high beacons on the top = 824.6 meters.